Research On Wave Energy Acquisition Technology Of Floating Sprocket Wheel

With the aggravation of energy crisis and environmental protection crisis,more and more people are deeply aware of the importance of developing new renewable energy.As a new type of renewable energy,wave energy has the advantages of large reserves,wide distribution and high energy flow density.More and more coastal countries and regions pay attention to its development and utilization.At present,the oscillating float wave energy device is a research hotspot in the field of wave energy,and the acquisition efficiency is the focus of its research.The floating sprocket wave energy device and the floating rope wheel wave energy device are all belong to the oscillating:float wave energy device,but the former solves the problems of the latter,such as serious rope wear and weak rope collection ability,so the reliability and acquisition efficiency are higher.Aiming at the floating sprocket wave energy device,this paper uses ADAMS to check the chain sloshing.Aqwa and Orcaflex to carry out hydrodynamic simulation of the floating sprocket wave energy device,and uses the simulation results to optimize the main parameters of the wave energy device with the maximum capture width ratio as the objective.The specific contents of this thesis are as follows:(1)Aiming at the problems of serious cable wear and weak rope-collecting ability existing in the floating rope wheel wave energy device,this paper puts forward the floating sprocket wave energy device,which uses sprocket mechanism and guide rod mechanism to replace rope wheel mechanism and guide rope mechanism respectively,and completely eliminates the rope wear problem.Vacuum cylinder chain-collecting mechanism is used instead of spring cable-collecting mechanism,which greatly improves the energy of chain-collecting(rope-collecting).Force creates conditions for improving the collection efficiency of wave energy devices;(2)In order to simulate the chain sloshing in the floating sprocket wave energy device by ADAMS,the crank-slider rocker mechanism was used to simulate the floating sprocket wave energy device,according to the motion law of the wave energy device in the wave.We use the software of Solidworks to complete the complete the modeling of equivalent mechanism,and the ADAMS to complete the complete the simulation of chain sloshing.Then,we extracted the relevant simulation calculation data.And based on the calculation method of chain sloshing,we draw the relationship curve between chain-closing force and chain sloshing of vacuum cylinder.According to this curve,the key parameters of vacuum cylinder for chain-closing are optimized;(3)Based on analyzing the wave energy device of floating sprocket in frequency domain by AQWA software,the hydrodynamic parameters of wave energy device are solved;and based on the software of Orcaflex,we researched the key technology of hydrodynamic simulation for floating sprocket wave energy device:using the spring damper module of Orcaflex to replace the sprocket mechanism equivalently,by setting the spring coefficient specially to realize the simulation of constant force chain-closing of vacuum cylinder,setting the damping coefficient reasonably to realize the simulation of one-way acquisition characteristics of wave energy device.Based on the above simulation technology,the calculation method of acquisition efficiency of wave energy device is studied and deduced,and the parameters such as mass,chain-closing force and damping of wave energy device are optimized by optimizing the maximum capture width ratio.(4)Based on the external method of sprocket mechanism,the physical experiment model and testing platform of wave energy device are established.The reliability of the optimization results of wave energy device quality,chain-closing force,damping and other parameters in the hydrodynamic simulation of floating sprocket wave energy device is verified by model experiment.